Top 100 Software Testing Companies in London
The Best of December 2025Looking for a top software QA company in London?
Hiring a software testing company is a necessity to both test and improve the services your company offers, especially in an increasingly digital world.
To assist you in your search for a partner, we’ve compiled this list of the top software testing companies in London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London Software QA Companies
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$5,000+50 - 249 employeesSeattle, WARead More
QA Wolf, an application testing company, was launched in 2019. The company provides application testing and has a small team.
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61$25,000+2 - 9 employeesLondon, EnglandLaunched in 2019, Yaya is an Enterprise App Modernization company. Their team specializes in Enterprise App Modernization and Product Design.Read More
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62$25,000+10 - 49 employeesLondon, EnglandAPPNETWISE is a Hyderabad, India-based IT strategy consulting company. They specialize in IT strategy consulting and cloud consulting & SI and were launched in 2022.Read More
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63$10,000+250 - 999 employeesLondon, EnglandVeracode is a Cybersecurity company located in Burlington, Massachusetts and London, England. They focus on Cybersecurity and Application Testing and were established in 2006.Read More
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64Undisclosed250 - 999 employeesLondon, EnglandExactpro, an Application Testing company, was launched in 2009. The midsize team specializes in Application Testing and Custom Software Development.Read More
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65$25,000+1,000 - 9,999 employeesCalabasas, CAProlifics is an ECM consulting and SI company. Launched in 1978, the team focuses on ECM consulting and SI and unified communications consulting & SI.Read More
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66Undisclosed10 - 49 employeesLondon, EnglandLaunched in 2016, Assured Thought, a small Application Testing company, is headquartered in London, England. Their team focuses on Application Testing and IT strategy consulting.Read More
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67$10,000+50 - 249 employeesHeathrow, EnglandEstablished in 2004, Root Info Solutions is an e-commerce development firm. The firm offers E-Commerce Development and Mobile App Development, and is midsize.Read More
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68$25,000+1,000 - 9,999 employeesHarrow, EnglandIT strategy consulting company Changepond Technologies Private Limited was established in 2000. The agency specializes in IT strategy consulting and IT managed services.Read More
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69$1,000+50 - 249 employeesPune, IndiaCustom software development company Hardcastle GIS was launched in 2011. The team provides Custom Software Development and Application Testing.Read More
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70$100,000+50 - 249 employeesRichmond upon Thames, EnglandEstafet is a midsize custom software development firm. Launched in 2002, the team provides Custom Software Development and Artificial Intelligence.Read More
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71Undisclosed250 - 999 employeesCity of London, EnglandLocated in Philadelphia, Pennsylvania and City of London, England, Invent Analytics is an AI company. They specialize in Artificial Intelligence and Application Testing.Read More
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72$5,000+10 - 49 employeesStanwell, EnglandQuirinus Solutions Ltd is a software development company. Located in Stanwell, England, the firm was launched in 2017. Their team provides Custom Software Development and E-Commerce Development.Read More
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73Undisclosed2 - 9 employeesLondon, EnglandFounded in 2020, Cyber Sense Limited is a Cybersecurity company. The team offers Cybersecurity and Application Testing.Read More
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74Undisclosed10 - 49 employeesLondon, EnglandHeadquartered in London, England and Amsterdam, Netherlands, Maxima Compliance is a Business Consulting company. Their services include Business Consulting and other IT consulting and SI.Read More
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75Undisclosed2 - 9 employeesLondon, EnglandCybersecurity company Cyber Legion was launched in 2021. Located in London, England, the team offers Cybersecurity and Application Testing.Read More
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76$5,000+2 - 9 employeesLondon, EnglandCode Development Ltd. Is a custom software development firm. The London, England-based company provides Custom Software Development and Application Testing.Read More
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77Undisclosed50 - 249 employeesLondon, EnglandApplication Testing and Robotics Process Automation company Resolve Systems was launched in 2014. The team focuses on Application Testing and Robotics Process Automation.Read More
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78$5,000+2 - 9 employeesRomford, EnglandHeadquartered in Romford, England, GGDX Ltd is a small website development company. The team offers Web Development and Application Testing.Read More
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79$1,000+10 - 49 employeesWallington, England3com3 is a call center company. Headquartered in Wallington, England, the firm focuses on Call Center Services and IT strategy consulting.Read More
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80$25,000+10 - 49 employeesLondon, EnglandAnswering service FX Digital was launched in 2011. The firm focuses on Call Center Services and Web Design, and is small.Read More
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81$1,000+10 - 49 employeesLondon, EnglandProkett is a SEO agency. Their team is in London, England and provides Search Engine Optimization and Application Testing.Read More
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82$5,000+10 - 49 employeesLondon, EnglandBased in Edinburgh, Scotland and London, England, Lynchpin Analytics is a small Marketing Strategy company. The team focuses on Marketing Strategy and Digital Strategy.Read More
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83Undisclosed250 - 999 employeesLondon, EnglandTen10 Group is a midsize Application Testing company. Founded in 2004, the team provides Application Testing and Artificial Intelligence.Read More
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84$25,000+2 - 9 employeesLondon, EnglandThisdotsoftware is a software development company. Their team is located in London, England. The agency focuses on Custom Software Development and Application Testing.Read More
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85$5,000+2 - 9 employeesLondon, EnglandHeadquartered in London, England, Techsleight is a small custom software development company. The team offers Custom Software Development and Web Development.Read More
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86$10,000+50 - 249 employeesLondon, EnglandHeadquartered in Bengaluru, India and München, Germany, Bluerose Technologies is a midsize software development company. The team provides Custom Software Development and IT staff augmentation.Read More
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87$10,000+2 - 9 employeesLondon, EnglandUser experience company UXB London is based in London, England. The team offers UX/UI Design and Digital Strategy.Read More
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88$1,000+10 - 49 employeesDagenham, EnglandParadox International Ltd is a social media marketing agency. Located in Dagenham, England, the team specializes in Social Media Marketing and Web Design.Read More
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89Undisclosed10 - 49 employeesLondon, EnglandUX design company Yarqat LTD is located in London, England and Kuwait City, Kuwait. Founded in 2023, the team focuses on UX/UI Design and Custom Software Development.Read More
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90$1,000+2 - 9 employeesErith, EnglandNuclecode is a web development company headquartered in Erith, England. Launched in 2023, the team focuses on Web Development and Web Design.Read More
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